iPhone 5 freezes in sleep mode, Reset required

My iPhone froze twice recently while in sleep mode. I had it in sleep mode for a while, when I cam back on it, nothing happens, non of the buttons are responsive. I had to reset (by holding both home and sleep button 10s) to bring it back to life and reboot.

What surprise me is that the situations were very different, with both iOS versions:

1st time:

- charging during the night (no alarm clock the next morning... ) on charger

- Wi-Fi OFF

- in silent mode

- iOS 6.0

2nd time:

- not connected to either computer or charger : 42% battery after reboot

- Wi-Fi ON

- not in silence mode

- iOS 6.0.1

I could not find any logs referring to these bugs according to their timing in the "Diagnostic & Usage Data" either.

i have the same issue and ive gotten a replacement from the apple store and im still having the same issue. seems to be a software problem. almost everyone i know with an iphone 5 is having this issue. i hope apple can fix the problem instead of continuing to swap phones. ive tries to restore with and without backup. still the same problem. this is my first iphone and im very disappointed.

it fixed itself without a iOS update. it was more than likely a common app that caused the problem and that app was updated. but i haven't had the issue in over a month...but no, i never activated do not disturb.

I have the same problem with my iPhone 5 and iOS 6.1.4. Sometimes it crashes very often over a few days, then not at all for a longer period of time. I do not use the "do not disturb". I do use iCloud backup, which usually goes well. It never crashes when I carry the iPhone around in my pocket. Could that mean that the problem is related to the accelerometer?

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